CHEMISTRY HIGH SCHOOL

What name should be used for the ionic compound LiI?

Answers

Answer 1
Answer:

What name should be used for the ionic compound LiI?

The name that should be used for the ionic compound LiI is Lithium iodide. When naming ionic compounds, you have to take into consideration pairing of two components. 
Answer 2
Answer:

Answer: The given compound is named as lithium iodide.

Explanation:

LiI is an ionic compound because lithium is a metal and Iodine element is a non-metal.

We know that, a bond which is formed between a metal and a non-metal is always ionic in nature.

Ionic bond is formed when there is a complete transfer of electron from an electropositive element (a metal) to an electronegative element (non-metal).

The nomenclature of ionic compounds is given by:

  1. Positive ion is always written first.
  2. The negative ion is written next with a suffix added at the end of the negative ion. The suffix used is '-ide'.

Hence, the name given to LiI will be lithium iodide.

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Positrons are spontaneously emitted from the nuclei of(1) potassium-37 (3) nitrogen-16
(2) radium-226 (4) thorium-232

Answers

Answer: Option (1) is the correct answer.

Explanation:

  • A positron is a small particle which contains a +1 charge and its mass is equal to the mass of an electron, that is, 9.109 * 10^(-31) kg.

A positron is represent by the symbol ^(0)_(+1)\beta.

For example, ^(37)_(19)K \rightarrow ^(37)_(18)Ar + ^(0)_(+1)\beta

  • Whereas nitrogen-16 does not decay to give a positron because nitrogen-16 is the daughter isotope formed due to decay of oxygen-16.

The decay reaction is as follows.

           ^(16)_(8)O \rightarrow ^(16)_(7)N + ^(0)_(+1)\beta

  • And, on radioactive decay of thorium-232 there will be formation of radium-228 along with emission of an alpha particle.

The reaction will be as follows.

            ^(232)_(90)Th \rightarrow ^(228)_(88)Ra + ^(4)_(2)\alpha

Therefore, we can conclude that out of the given options positrons are spontaneously emitted from the nuclei of potassium-37.
Positrons are spontaneously emitted from the nuclei of potassium -37.

Prior to the Civil War, the North had 80 percent of the _____ capacity in the United States.A. agricultural
B. political
C. manufacturing
D. military

Answers

Answer:

C. manufacturing

Explanation:

With the Independence of the Thirteen Colonies in 1776, the colonies became independent states, but united in a Federation, with republican and presidential political representation. States in the northern region concentrated on the development of industry and, to that end, needed free and salaried labor to operate the work within the factories. Prior to the secession war, the northern states had 80 percent of manufacturing capacity in the United States. The formation of the working class and the industrial bourgeoisie in the North has also produced a specific way of looking at political activity and civil rights.
The North had 80% of the manufacturing capacity in the U.S. before the Civil War. The North was filled with factories, whereas the South relied on farming and slaves to survive, they produced a lot of cotton and tobacco for example. During the Civil War as you could imagine, the North was making a lot of artillery, so its economy began to expand more to meet the demands of war.

In the electron cloud model, if you begin at the electron shell closest to the nucleus of an atom and move out, what is the number of electrons that each energy level or electron shell needs to fill the first four electron shells?A. 2, 6, 10, 14
B. 2, 8, 18, 32
C. 8, 8, 8, 8

Answers

Option B: 2, 8, 18, 32.

2 in the K shell, 8 in L shell, 18 in M shell and 32 in N shell.

If you were asked to describe metals and magnetism you could say. A. non–paired electrons spin in opposite directions in all metals, creating a magnetic field. B. metals are magnets because they have more electrons than non–magnetic materials. C. metals can become magnetic if they have many spinning electrons that create magnetic fields. D. the electrons in some metals pair up to create a magnetic field.

Answers

Answer : Option D) the electrons in some metals pair up to create a magnetic field.


Explanation : Most of the metalsare magnetic in nature including some exceptions. When the unpaired electrons get aligned with the magnetic field they posses magnetism. Also there are some paired electrons in metals which align themselves according to the magnetic field and create magnetism in them.

The correct answer is C;  Metals can become magnetic if they have many spinning electrons that create magnetic fields.

Further Explanation;

As long as there are many spinning electrons anything metal will become magnetic. Ferromagnetic is when there are only some certain types of metals that are attracted to magnetic. If you were to make an electromagnet, you would only need to take an insulated wire and wrap it around the metal that has ferromagnetic properties.

Learn more about magnetism at brainly.com/question/1228801

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Atoms are to molecules as: a) Chimneys are to roofs. b) Windows are to doors. c) Keys are to locks. d) Bricks are to walls.

Answers

Atoms are to molecules as bricks are to walls.
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